1477136857621 has 2 divisors, whose sum is σ = 1477136857622. Its totient is φ = 1477136857620.

The previous prime is 1477136857589. The next prime is 1477136857673. The reversal of 1477136857621 is 1267586317741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 859829652900 + 617307204721 = 927270^2 + 785689^2 .

It is an emirp because it is prime and its reverse (1267586317741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1477136857621 - 2⁵ = 1477136857589 is a prime.

It is a super-2 number, since 2×1477136857621² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1477136857321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 738568428810 + 738568428811.

It is an arithmetic number, because the mean of its divisors is an integer number (738568428811).

Almost surely, 2^{1477136857621} is an apocalyptic number.

It is an amenable number.

1477136857621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1477136857621 is an equidigital number, since it uses as much as digits as its factorization.

1477136857621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 58.

The spelling of 1477136857621 in words is "one trillion, four hundred seventy-seven billion, one hundred thirty-six million, eight hundred fifty-seven thousand, six hundred twenty-one".